Here's Why We Can't Live Stream From Mars
Most of us on earth only get to see space through the pictures spacecrafts take up there. How exactly do those pictures get back to earth? How We Know NASA ...
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You know what’s the coolest thing ever? Not that we can send spacecraft to distant planets but that we can get hi-res images back! Yeah. Awesomesauce. Hello, everyone, Amy getting nerdy about SPACE today with you on DNews! Every spacecraft, telescope, probe, or lander we’ve ever sent into space has to communicate with the Earth to both receive commands and return data. Since 1957, when the Soviet Union launched the first ever satellite, Sputnik, they’ve all used radio waves. A radio wave has a regular pattern, so data is encoded by either changing the amplitude, more simply the height of the wave, or the frequency, which is how close the peaks are together, a value measured in Hertz. If we’re changing the amplitude, for example, some peaks can be higher than others and we can a...
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You know what’s the coolest thing ever? Not that we can send spacecraft to distant planets but that we can get hi-res images back! Yeah. Awesomesauce. Hello, everyone, Amy getting nerdy about SPACE today with you on DNews! Every spacecraft, telescope, probe, or lander we’ve ever sent into space has to communicate with the Earth to both receive commands and return data. Since 1957, when the Soviet Union launched the first ever satellite, Sputnik, they’ve all used radio waves. A radio wave has a regular pattern, so data is encoded by either changing the amplitude, more simply the height of the wave, or the frequency, which is how close the peaks are together, a value measured in Hertz. If we’re changing the amplitude, for example, some peaks can be higher than others and we can a...
